131243451 has 32 divisors (see below), whose sum is σ = 195084288. Its totient is φ = 78059520.

The previous prime is 131243447. The next prime is 131243459. The reversal of 131243451 is 154342131.

It is a happy number.

It is not a de Polignac number, because 131243451 - 2² = 131243447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131243459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148531 + ... + 149411.

It is an arithmetic number, because the mean of its divisors is an integer number (6096384).

Almost surely, 2^131243451 is an apocalyptic number.

131243451 is a deficient number, since it is larger than the sum of its proper divisors (63840837).

131243451 is a wasteful number, since it uses less digits than its factorization.

131243451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051.

The product of its digits is 1440, while the sum is 24.

The square root of 131243451 is about 11456.1534120315. The cubic root of 131243451 is about 508.1897257211.

Adding to 131243451 its reverse (154342131), we get a palindrome (285585582).

The spelling of 131243451 in words is "one hundred thirty-one million, two hundred forty-three thousand, four hundred fifty-one".